Compensating gear



W. 0. LUM.

' COMPENSATING GEAR. APPLICATION FILED JUNE 11. 1921.

' 1. 1:34 3 Patented Oct. 31, 1922.

2 SHEETS-SHEET I.

i f 9 A I H H Him 1 I Hi l H 1 IN V EN TOR.

W. 0. LUM. COMPENSATING GEAR. APPLICATION FILED JUNE 11, 1921.

1,434,063. A Patented Oct. 31, 1922.

2 SHEETSSHEE'I 2- mmvron.

lPatented 31, 12922.

unite stares wnnrnn 0. Lori, or HEMPSTEAD, nnw "roan, nssrenon'ro sonar coinrnrn SATING onna 00., or sen rnancrsco, canine-mun, A conronnrron.

COMPENSATING GEAR.

Application filed June 11,

To (ZZZ whom it may concern.

Be it known that 1, Warrant Q. LUM, a citizen of the llnited States, residing at llempstead, county of Nassau, State of New York, have invented certain. new and useful Improvements in Compensating Gears, whereof the following is a specification.

This invention relates to compensating gear of the type set forth in the specifications of Letters Patent issued to Edwin J. Gould February 26th, 1907. No. 8%5 109, c inpensating gear. 1

The objects of the invention are, first, to strengthen the device while at the same time changing the combination ofthe parts in such a way that the device will work efiiciently in a smaller casing; second, to so construct and combine the severalparts that the cost of manufacturing the parts and assembling them will. bereduced; and third. to provide an effective means of lubrication, with the foregoing and other objects in view, which will appear in the specifications, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed.

In the accompanying drawings, forming part of this specification. Fig. 1, is a side view in elevation of the device; Fig. 2, is a view partly in section at right angles to Fig. 1; Fig. 3, is a side view of one of the hubs to which the eccentrics are attached showing splines in the hub and the eccentrics in dotted. lines; Fig. 4:, is a longitudinal view of one of the hubs; Fig. 5, is a side view of one of the eccentrics showing splined constructiou to fit splines on the hub; Fig. 6, is a top view of one of the eccentrics showing spiral. groove for lubricating; Fig. 7, a sectional view of eccentrics and aligned shafts, showing hollow bushing; and Fig. 8, a sectional view of eccentrics and aligned shafts, showing alignment cylinder between the ends of the aligned shafts.

Similar numerals refer to similar parts throughout the several views. 1 is a section of a live axle, 2 is the opposite section of the live axle in alignment with section 1, to each section of the live axle are keyed splined hubs 3- 3, to which the internally splined eccentrics are fitted. Eccentrics 4t and 5,. being at right angles to each other, that is a line drawn through the long center of eccentric .1-, would be disposed at an angle 1921. S ra No. 476,902.

131105 6 and 7 se at right angles to each other,

are attached to the hub 3, keyed to axle section 2. Links respectively numbered 8--9 10 and 11 have their large or inner ends made as a ring or hearing said bearing on each link fitted to surround one of the cocentrics and. the combination of links and eccentrics so assembled. that the adjacent eccentrics are connected to the diametrically opposite pins 12 and 1. The links at their outer or smaller ends are formed into bokings surrounding pins 12 and 13. The outer ends of links 8 and 11 fitting around pin 12, and the outer ends of links 9 and 10 fitting around. pin The outer ends of links 9 and 11 are long boxings enclosing or more of the length of pins 12 and 13, and the outer ends of links 8 and 10 are short boxings enclosing J,- or less of the length of the pins.

I and particular to point out in this description, to which eccentric each link fits. and that links 8 and 11 are connected to pin 12, and that links 9 and 1.0 are connected to pin. 13, because this construction with the long boxings formed by the outer ends of links 9 and 11 add greatly to the strength of the device by counter-acting the side strain on the pins causing the device to run smoothly without twist or strain on the eccentrics. The ends of pins 12 and 13 are fitted into holes in slide blocks 14, said slide blocks running in grooves cut on the inside of the casing 15, the slide block acting as cross heads for taking the side thrust of the links and to provide a large bearing surface for the pin ends; 16 is a separate alignment bushing to hold the shaft sections 1 and 2 in alignment and extending through eccentrics 5 and 7 to take care of the reactive forces produced by the thrust and pull of the links on the eccentrics, said bushing to be constructed as a hollow cylinder through which the ends of the aligned shafts pass, to react against each other to take the wheel thrust as shown in 7, or as a solid cylinder 17 (as shown in Fig. 8) free to slide latterly within the hubs 33 and against the ends of said axles, said cylinder acting only as an alignment cylinder. 18 indicates the splines in the hubs and eccentrics, thus allowing each eccentric to be made sparately and allowing the hubs to be made heavier at the outer ends adding strength to the hubs.

' As the eccentrics can be slipped on sparately every eccentric is then. a duplicate of every other eccentric, and therefore they do not need to be made in pairs and can be fitted to the splined hubs at the proper angle to each other. 19 is the spiral groove in the peripheral "face of the eccentrics to provide an efiicient and simple means of lubrication. 20 indicates radially and axiallyarranged ducts orpassages progressing from the center outward through the various members of the mechanism, so that lubricant can be continually forced to the working sui'i aces by centrifugal action,-ot the rotating parts-on the lubricating medium.

It will be seen by the drawings and the description of the device, that When the axle section 1 is turned in one direction by force applied directly to it, and simultaneously a force is applied to axle section 2 to rotate it in the opposite direction (as is the case when a motor vehicle is turning a corner)the device will allow this action to take place, and function perfectly. But power can not be transmitted through the casing, to force one axle section to rotate faster than .the other, but all accelerating or retarding of the rotation ofeither axle section must be caused by separate'forces applied to the axle sections themselves, and to cause this positive action on both axle sections, While allowing perfect differential action, is the purpose and advantage of my improvements in this device.

Having thus described my improvements, I claim:

1. In a compensating gear of the link and eccentric type, links made in rights and lefts, one link of each pair having a long boxing at its smaller or outward end, and the other link of each pair, having a short boxing, at its smaller or outer end, a casing, slide blocks adapted to slide in grooves in said casing, pins having each of their ends mounted in one of said slide blocks, each pin passing through boxings on the smaller or outWar-d ends of each matched pair of said links, thelarger end of each link, surroundin an eccentric set at right angles to a second eccentric, each matcied pair oi? links connecting every second eccentric in succession to the same slidably mounted pin.

In a compensating gear of the link and eccentric type, two aligned axle sections, externally splined hubs attached to said axle sections, and eccentrics ha ing internally splined holes fitting said externally splincd hubs.

3. In a compensating gear of the link and eccentric type, a casing, aligned axle sections entering into said casing, an alignment bushing fitting the ends of said live axle sections, splined hubs, eccentrics fitting said splined hubs, saidalignmcnt bushing having a running lit in holes in the abutting ends oi? the said splined hubs a i In testimony that I claim the foregoing, I have hereunto set my hand in the presence of two Witnesses.

VALTER LUM.

Witnesses FRED GERHEN, F. J. Merl-rims. 

